[src/uebayasi-xip]: src/sys/uvm Comment.

[uebayasi <uebayasi%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4bdde13c013b
branches:  uebayasi-xip
changeset: 751719:4bdde13c013b
user:      uebayasi <uebayasi%NetBSD.org@localhost>
date:      Fri May 28 15:26:22 2010 +0000

description:
Comment.

diffstat:

 sys/uvm/uvm_device.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (29 lines):

diff -r d4459029af59 -r 4bdde13c013b sys/uvm/uvm_device.c
--- a/sys/uvm/uvm_device.c      Fri May 28 09:14:55 2010 +0000
+++ b/sys/uvm/uvm_device.c      Fri May 28 15:26:22 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_device.c,v 1.57.2.1 2010/04/27 08:20:09 uebayasi Exp $     */
+/*     $NetBSD: uvm_device.c,v 1.57.2.2 2010/05/28 15:26:22 uebayasi Exp $     */
 
 /*
  *
@@ -39,7 +39,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_device.c,v 1.57.2.1 2010/04/27 08:20:09 uebayasi Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_device.c,v 1.57.2.2 2010/05/28 15:26:22 uebayasi Exp $");
 
 #include "opt_uvmhist.h"
 
@@ -428,7 +428,9 @@
                    ufi->orig_map->pmap, curr_va, paddr, mapprot);
                /*
                 * XXXUEBS
-                * always map device pages as unmanaged (uncached) for now.
+                * always map device pages as unmanaged (uncached) for
+                * now.  this may be changed when UVM will support some
+                * "managed" device pages like PAT in the future.
                 */
                if (pmap_enter(ufi->orig_map->pmap, curr_va, paddr,
                    mapprot, PMAP_CANFAIL | PMAP_UNMANAGED | mapprot) != 0) {